This is a list of the MPs or members of Parliament elected to the House of Commons for the constituencies of the Parliament of the United Kingdom in the 1812 United Kingdom general election, the 5th Parliament of the United Kingdom, and their replacements returned at subsequent by-elections, arranged by constituency.

__NOTOC__ Table of contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z By-elections Changes

A Aberdeen Burghs (seat 1/1) James Farquhar Aberdeenshire (seat 1/1) James Ferguson Tory Abingdon (seat 1/1) Sir George Bowyer Whig Aldborough (seat 1/2) Henry Fynes Tory Aldborough (seat 2/2) Henry Dawkins – resigned Replaced by Henry Gally Knight 1814 – resigned Replaced Granville Venables Vernon 1815 Tory Aldeburgh (seat 1/2) The Lord Dufferin & Claneboye Tory Aldeburgh (seat 2/2) Andrew Strahan Tory Amersham (seat 1/2) William Tyrwhitt-Drake Tory Amersham (seat 2/2) Thomas Tyrwhitt-Drake Tory Andover (seat 1/2) Thomas Assheton Smith I Tory Andover (seat 2/2) Newton Fellowes Whig Anglesey (seat 1/1) Berkeley Paget Whig Anstruther Easter Burghs (seat 1/1) Sir John Anstruther – died Replaced by Alexander Maconochie 1818 County Antrim(seat 1/2) Hon. John Bruce Richard O'Neill Tory County Antrim (seat 2/2) Earl of Yarmouth Tory Appleby (seat 1/2) James Lowther Tory Appleby (seat 2/2) John Courtenay – resigned Replaced by George Tierney 1812 WhigWhig Argyllshire (seat 1/1) Lord John Campbell Armagh (seat 1/1) Patrick Duigenan – died Replaced by Daniel Webb Webber 1816 ToryTory County Armagh (seat 1/2) William Brownlow – died Replaced by Henry Caulfeild 1815 Tory WhigCounty Armagh (seat 2/2) William Richardson Tory Arundel (seat 1/2) Henry Thomas Howard Molyneux – sat for Gloucester Replaced by Samuel Romilly 1812 Arundel (seat 2/2) Francis Wilder Ashburton (seat 1/2) John Sullivan Ashburton (seat 2/2) Richard Preston Athlone (seat 1/1) John Wilson Croker Tory Aylesbury (seat 1/2) George Nugent, 1st Bt. Aylesbury (seat 2/2) Thomas Hussey – resigned Replaced by Charles Compton Cavendish 1814 Ayr Burghs (seat 1/1) Duncan Campbell Ayrshire (seat 1/1) Sir Hew Dalrymple-Hamilton B Banbury (seat 1/1) Frederick Sylvester North Douglas Bandon Richard Boyle Bernard – resigned Replaced by William Sturges Bourne 1815 ToryTory Banffshire (seat 1/1) Robert Abercromby Barnstaple (seat 1/2) Sir Manasseh Masseh Lopes Tory